Method of constructing concrete cribs



Nov. l0, 1925.

, 1,560,880 J. H. TRQMANHAUSER METHOD oF coNsTRucTING CONCRETE cRIBs Filed Nov. 14, 1924 2 Sheets-Sheet 2 El-a5.. f Ik H* l1 INVENTEIFL.

To all whom t may concer/t.' g

Patented; Nov'. l0, 1925.

UNl'TEDsTATEs JEssE H. TEoMANnAusERoE ToRoN'ro, ONTARIO, CANADA.

lMETHOD oF coNsTRUoTING CONCRETE cimas.,-

fApplication led November-14, 1924. Serial No. 749,837.

Be it known that I, JESSE H. .TROMAN- HAUsER, of the' city of Toronto,`in the county of York, Province of Ontario, Canada, a subject of the King of Great Britain, have invented certain-new and useful Improve-V ments in Methods of Constructing Concrete Cribs, of which the following is a specificawith side walls along itsedges, buildingfa crib on said pontoon and within itswalls,

and subsequently sinking the crib and pon`r While this `procedure` was.

toon together. d satisfactory with small cribs, it was not so satisfactory with large cribs owing to the expense involved in building a separate pon# toon for each crib and to trouble experienced owing to the'tendency of the pontoon bottoms tobulge up.` in the middle.

The object of the presentv invention is-to'A devise a method and means whereby the pontoons maybe 1re-usedA and the trouble ex'-v perienced with the'upward bulging ofthe bottoms overcome.

` I attain my objects'byl providing a pon? toon with low fixed marginal walls and'with higher' removable walls spaced inwardly from the outer walls. Inside the inner'wa-lls the concrete crib is'built up to the requiredj height while the pontoon is afloat. 'The tops of the 'low walls remain -above rthe' water while the removable wall is being p`o-- sitioned and until the concrete is'builtnpto a considerable height, thereafter subine'rgf` ing. After the crib is fcompleted to "ai height sufficient to enable it tofloat lwit-hout extraneous support, the innery sidel walls f are removed' and the pontoon-` bottomf stripped off by placing weightsA on it at one-end a'ndk along the sides if necessary, to Ysink'the end wall below thebottom of. the' concretecrib The crib is then 'easilytowedaway fromA the pontoonand is then sunk'lin `the desired location.V .The dismantledpontoontis then relieved of its weights andfthe i'nnerwvalls.l again `:secured in '.position',;.zwheii `"'thje pon-2 1,560,880A P4,3513?NT*g y05E-FlCEE:

toon is'. readyV for the building` ofv thefnext f crib. Thefinvention is illustrated in the panying drawingsin` which. y y

Fig. 1 is a side elevation, partlyiin section, of a crib constructed with my invention;

Fig. 2a plan-view of thepsarne;l`i "i Fig. 3 a side elevationshowing the meth-v odpf stripping the pontoon bottom from the cri l f l Fig. 4cv a detail ofthe ycorner connectionsy offthe inner crib walls;v y Y.

. Fig.f5 a detail fof thehoisting straps and shackles and lfastening `bolts `of the inner walls.- j l f f Referringparticularly to Figs. '1 to 5 of accom- Y in accordance i f the drawings, 1v is thel .pontoon vbottonn;

which .may be of any suitable construction,- but which isv preferably double and isprof,

vided withgtransverse ycross beams-2'at its j under side.` Secured to the bottomsubstan-` tially at its edges'are the iixedwalls' By xed is vto be understood that. the walls nor-. ma'lly remain in position, though they might, of course, be so constructedthat they might be removed vif occasion required. Spaced inwardly from the fixed walls are thedeta'chable walls'l. These walls ypreferyably'are of a greaterheightfthanvthe'walls 3i Vhile' any f suitable vmeans might be em` y ployed for Vsecuring these kwalls yto the 'bot-1 tom. and ftoi one another', I prefer'to employ i the means shownfparticularlyin Figs. 4 and o. A'plurality offbolts or wallrods 5- are y provided, each having its upperendf''adapt# i' ed` for engagement 'by' a wrench,"while the lower endl Tis threaded.4 The walls-@fare provided 'withfsuitable openings forthe pas-v sage ofthese wall rods, whichL are provided with: shoulders 8 adapted 'to 'engage` theflup'f 5 per'sides of the walls.' f The ends 7 are adapt-- edA toscrevvint'o nuts 9 boltede'securely to Vthe bottom 1. The Walls@ atffthe cornersar-e"v provided withV clamp" members 10i securely' bolted theretoVv and. a'daptedl-a-t:'theirliouter ends for: the passagefof the lbolts 11.

E To each :wallet aregsecureda pluralityzof hoisting'straps 12"each having anopening.-

therethrough adj aCentLits'upper endfor .the

passage of the bolt 13 bymea'ns ofwhic'hi'a hoisting shackle .14 willr'beA securedIto1 thef strapfi a n' quiet walls in posit-ion,i s securely moored waters; and the detachable walls are then secured in position by means of the wall A rods 5 and the clamps 10. A hollow crib walls are secured'in position.

formed of concrete is then built up within the detachable walls 4C in themann'er described in my prior patent hereinbefore referred to7 suitable inlet valves 16 being positioned in the bottom ofthe crib and ap# pertures 17 through any transverse walls which may be formed within the crib.' The fixed Walls 3 exclude water from the upper surface of the Abottom until the detachable r As the concrete crib is built up, these walls are gradually submerged and the duty of protecting the crib during construction devolves upon the walls 4, which will usually be high enough so that when the concrete crib 1s built up high enough to makethe'fcrib selffloatable, the upper edges of these walls are still near' or above the surface of thewater. The pontoon is then I'stripped from"` the completed cribv in the followingmanner.

The clamps are disconnected and the wall rods 5 withdrawn. The side walls are then stripped from the .'fcrib bymean'spo suitable prying tools. 'Weights are thenlplac'ed 'at one vend ofthe pontoon bottom.between'the .Yendiotfthe criband the endwallA 3;"and the end of-.jthe pontoon bottom forced down untilithe upper `edge of' the end. wall 1s belowfthebottom of theconcrete crib: The

` whole-:bottoni is theneasily towed clear of thecrib, which. then may be filled with water through the valvesv 16 and sunk -in position,thereafter being jiilled with solid Vmaterial. s

.By using the pontoon constructed asdescribed, andin Vthe manner set fortl1,each pontoon is available for the construction ,of-

a plurality of cribs, a great saving bothin timegand material being thus effected. fzzThe -side walls'ai'e provided Vwith hoistingfstraps.

12 having shackles 14 connected thereto by meansl ofi which` the wallsmay vbe-lifted -Toovercome the tendency yof* the pontoon bottom bulging'upwardlyin the middle or hogging" I Vprovide.thebottomjof` the crib .with ballast.21. Preferably this bal.- last is carried` betweenithe double walls of the bottom 1 and isformed ofa plurality of ,concrete slabs arrangedV longitudinally` of the bottom and substantially -at f right angles to the cross beams 2.?l v Another obj ect of using lthis 'ballastisto reduce the buoyancy offthe bottom o'f -the pontoon, so that itiwill not be necessaryto usesomany weights on thepontoon bottomA` when itis desired `to remove the bottom below the crib.

pontoon bottom within the pontoonnvalls and while the pontoon is aoat.; disconnecting and stripping the pontoon sides; and iinally stripping- -the pontoon bottom from below the' crib. A

2. The vmethod ojfconstructing a concrete crib which consists in providing a pontoon bottom" with `removable side walls spaced inwardly' from the edges of the bottom; building a fioatablecrib with concrete walls on said' pontoon bottom within-*thepontoon walls and while the pontoonis afloat; disconnecting and stripping the pontoon'sides; and nally stripping the pontoon bottom from below' the crib by weighting. j;

3. A method "offconstructing a concrete crib whichconsists in providing a pontoon bottom with permanent side walals and with removable 'side walls spaced inwardly'froin the permanent' walls; building al loatable crib .with yconcrete walls onsai'd pontoon bottom Y within Vthe inner pontoon wallsl :and while the pontoon is afloat; disconnecting and stripping the inner'pontoon sides; and finally. stripping the pontoon zbottom' from f -4.-The method ofconstructingLandplac# ing avconcrete crib which consists'i-n building a hollow crib afloat; supporting it dur-l ing .buildingby' a structure serving both as a float anda form; vstripping saidstruc ture from the crib; and inallyk sinking the crib in position. f

5. A pontoon for the construction of concrete cribs comprisingv a: pontoon bottom; iXed substantially watertightwalls secured theretoy around its edges; and :detachablewalls also secured thereto infspacedrelati0nship to the fixed walls andadapted to-form outside mold walls.

6. Ar pontoon for the construction ot' con-A cretev cribs comprising a buoyant "pontoonV bottom; and detachable walls secured thered toand spaced inwardlyfrom theedges of said bottom and adaptedv to form outside mold walls. Y

7". A buoyant pontoon comprising aA pon-y toon bottom; -our detachable walls spacedA inwardly from the edges of sa'i'dbott'om;j bolts extending from topto `bottom to .form outsidemold walls 'of said walls detachably securing the Walls f to v'the "pontoon bottom; and clamps yreleasably securing thel ends oi the walls together. f Y y.

' Y :8. A pontoonfor theronstructionof'c on-Y i' crete cribsfcomprising a buoyant pontoon, bottom; detachable walls vsecured vthereto and spacedinwardlyy from the edges' of said bottom to form outside,=1holdvwalls; and ballast for the pontoon bottom positioned "I toresistfthe hogginggof-thebottoin whenthe load is applied adjacent the edges? a? V9.` 'A pontoon 'for thecons'truetiton of fconf cre'te cribs? coinprisingg-a doublev pontoon bottom; "detachable .walls secure'd-fxtheeto;

so v

and spaced inwardly Jfrom the edges of said bottom to form outside mold walls; and ballast for the pontoon positioned within the double bottom to resist the hogging of the bottom when the load is applied adjacent the edges.

l0. A pontoon for the construction of concrete cribs comprising a buoyant pontoon bottom; detachable walls secured thereto and spaced inwardly from the edges of said bottom to form outside mold walls; and hoisting straps securedto said walls.

1l. A pontoon for the construction of concrete cribs comprising a 'pontoon bottom; fixed substantially watertight walls secured thereto around its edges; and detachable substantially watertight walls also secured thereto in spaced relationship to the fixed walls, said detachable walls being of greater height than the fixed walls and adapted to form outside mold walls andto act as pontoon walls when the lower fixed walls have become submerged.

12. A pontoon for the construction ot' concrete cribs comprising a pontoon bottom; fixed substantially watertight walls secured thereto around its edges; and detachable substantially watertight walls also secured thereto in spaced relationship to the fixed walls, said detachable walls being of greater height than the iixed walls and adapted to iorm outside mold walls and to act as pon- Y toon walls when the lowerV fixed walls have become submerged; and hoisting straps secured to said detachable walls.

18. A pontoon for the construction of concrete cribs comprising a pontoon bottom; fixed substantially watertight walls secured thereto around its edges; and detachable substantially watertight walls also secured thereto in spacedV relationship to the fixed walls; bolts extending from top to bottomy of said detachable walls securing the walls to the pontoonvbottom; and clamps releasably securing the ends of the walls together, said detachable walls being of greater height than the fixed walls and adapted to form outside mold walls and to act as pontoon walls when the lower' fixed walls have become submerged.

14. A pontoon for the construction of concrete cribs comprising a buoyant double pontoon bottom; fixed substantially water-1 Signed at Toronto, Canada, this 16th day i of October 1924. l' p JESSE n. TROMANHAUSER. 

